航空便なら3日で届く

N3 航空 koukuu aviation, air transport N3 便 bin way, means; flight N4 日 hi day, sun, sunlight N3 届く todoku to reach

N2 航 kou navigate, sail, cruise N4 空 kuu / sora, a.ku, a.ki, a.keru, kara, su.ku, su.kasu, muna.shii empty, sky, void N3 便 ben, bin / tayo.ri convenience, facility, excrement N5 日 nichi, jitsu / hi, -bi, -ka day, sun, Japan N2 届 kai / todo.keru, -todo.ke, todo.ku deliver, reach, arrive

N4 〜なら nara Indicates a condition based on context or already mentioned topic, means if it is the case of N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context